<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script src="../js/vue.js"></script>
    <div id="app">{{msg}}</div>

    <script>
        let vm = new Vue({
                el: "#app",
                data: {
                    msg: '初始数据'
                }
            })
            console.log('vm.$data.msg:' + vm.$data.msg)
            console.log('vm.msg:' + vm.msg)
    </script>
</body>

</html>